Sunday, February 10, 2008

science blurb...some interesting new tree ring data


from World Climate Report: "As seen in Figure 1, the region has definitely been warming over the past century, and a case could be made for a warming of nearly 2°C over the past 100 years. Come to think of it, that could be a great headline “Arctic Warming Confirmed!” However, Grudd explains:
“The late-twentieth century is not exceptionally warm in the new Torneträsk record: On decadal-to-century timescales, periods around AD 750, 1000, 1400, and 1750 were all equally warm, or warmer. The warmest summers in this new reconstruction occur in a 200-year period centred on AD 1000. A ‘Medieval Warm Period’ is supported by other paleoclimate evidence from northern Fennoscandia, although the new tree-ring evidence from Tornetraäsk suggests that this period was much warmer than previously recognised.” (emphasis added)

We will leave you with this very interesting conclusion from Grudd’s research:
“The new Torneträsk summer temperature reconstruction shows a trend of -0.3°C over the last 1,500 years.”"